<template>
	<view class="container">
		<!-- 空白页 -->
		<view v-if="!hasLogin || empty===true" class="empty">
			<image src="/static/emptyCart.jpg" mode="aspectFit"></image>
			<view v-if="hasLogin" class="empty-tips">
				空空如也
				<navigator class="navigator" v-if="hasLogin" url="../index/index" open-type="switchTab">随便逛逛></navigator>
			</view>
			<view v-else class="empty-tips">
				空空如也
				<view class="navigator" @click="navToLogin">去登陆></view>
			</view>
		</view>
		<view v-else>
            
            <scroll-view
            :style="'height:'+height+'px;'"
            	class="list-scroll-content " 
            	scroll-y
            	@scrolltolower="loadData"
              
            
            >
              <!--  <view class="cart-list" v-for="item in  1000">
                    1231
                </view> -->

			<!-- 列表 -->
			<view class="cart-list">
                    
                
                
                
				<block v-for="(item, index) in cartList" :key="item.id">
					<view
						class="cart-item" 
						:class="{'b-b': index!==cartList.length-1}"
					>
						<view class="image-wrapper">
							<image :src="item.item.cover_img" 
								:class="[item.loaded]"
								mode="aspectFill" 
								lazy-load 
								@load="onImageLoad('cartList', index)" 
								@error="onImageError('cartList', index)"
                                @click="navToDetailPage(item.item)"
							></image>
							<view 
								class="yticon icon-xuanzhong2 checkbox"
								:class="{checked: item.checked}"
								@click="check('item', index)"
							></view>
						</view>
						<view class="item-right" >
							<text class="clamp title">{{item.item.title}}</text>
							<text class="attr" v-if="item.sku!==null && item.sku.skus.length>0" >
                            <text v-for="(skuitem,id) in item.sku.skus " :key="id">    {{skuitem.norm_value}}</text>
                          
                            
                            </text>
							<text class="price">¥{{item.item.goods_price}}</text>
							<uni-number-box 
								class="step"
								:min="1" 
								:max="item.item.goods_lave"
								:value="item.num>item.item.goods_lave?item.item.goods_lave:item.num"
								:isMax="item.num>=item.item.goods_lave?true:false"
								:isMin="item.num===1"
								:index="index"
								@eventChange="numberChange"
							></uni-number-box>
						</view>
						<text class="del-btn yticon icon-fork" @click="deleteCartItem(index)"></text>
					</view>
				</block>
			</view>
            <uni-load-more :status="loadingType"></uni-load-more>
            </scroll-view>
			<!-- 底部菜单栏 -->
            
			<view class="action-section">
				<view class="checkbox">
					<image 
						:src="allChecked?'/static/selected.png':'/static/select.png'" 
						mode="aspectFit"
						@click="check('all')"
					></image>
					<!-- <view class="clear-btn" :class="{show: allChecked}" @click="clearCart">
						清空
					</view> -->
				</view>
				<view class="total-box">
					<text class="price">¥{{total}}</text>
					
				</view>
				<button type="primary" class="no-border confirm-btn" @click="createOrder">去结算</button>
			</view>
		</view>
	</view>
</template>

<script>
	import {goodsLists,cartLists} from '../../api/Json.js'
      import uniLoadMore from '@/components/uni-load-more/uni-load-more.vue';
	import {
		mapState
	} from 'vuex';
	import uniNumberBox from '@/components/uni-number-box.vue'
    import {getOne,postOne} from "@/api/publicapi.js"
	export default {
		components: {
			uniNumberBox,
             uniLoadMore
		},
		data() {
			return {
				total: 0, //总价格
				allChecked: false, //全选状态  true|false
				empty: false, //空白页现实  true|false
				cartList: [],
				hasLogin:true,
                height:0,
                page:1,
                loadingType:'more'
			};
		},
		onShow(){
            this.cartList = []
           this.loadingType = 'more'
			this.loadData();
            this.page =1
            let that =this
            uni.getSystemInfo({
                success: function (res) {
                    console.log(res)
                        that.height = res.windowHeight
                
                }
            });
		},
        
		watch:{
			//显示空白页
			cartList(e){
				let empty = e.length === 0 ? true: false;
				if(this.empty !== empty){
					this.empty = empty;
				}
			}
		},
		computed:{
			// ...mapState(['hasLogin'])
		},
		methods: {
            navToDetailPage(item) {
            	//测试数据没有写id，用title代替
            	let id = item.id;
            	uni.navigateTo({
            		url: `/pages/product/product?id=${id}`
            	})
            },
			//请求数据
			 loadData(){
         
                if(this.loadingType === 'loading' || this.loadingType === 'noMore' ){
                    //防止重复加载
                    return;
                }
                        
                
                this.loadingType = 'loading';
               getOne('front/shopcart',{page:this.page}).then(res => {
                   let  orderList = res.data
              
                   if(this.page==1 && orderList.length<=0){
                       this.empty =true
                   }
                     if(orderList.length>0){
                         this.page += 1
                         for (var i = 0; i < orderList.length; i++) {
                             orderList [i].checked =false
                            this.cartList.push(orderList [i]) 
                         }
                       
                     }else{
                       
                     }
                       if(res.per_page*res.last_page < res.total){
                           this.loadingType = 'more'
                       }else{
                             this.loadingType = 'noMore';
                       }	
                        
                    
                     
                  
               })
				// let list = await cartLists(); 
				// let cartList = list.map(item=>{
				// 	item.checked = true;
				// 	return item;
				// });
				// this.cartList = cartList;
				// this.calcTotal();  //计算总价
			},
			//监听image加载完成
			onImageLoad(key, index) {
				this.$set(this[key][index], 'loaded', 'loaded');
			},
			//监听image加载失败
			onImageError(key, index) {
				this[key][index].image = '/static/errorImage.jpg';
			},
			navToLogin(){
				uni.navigateTo({
					url: '/pages/public/login'
				})
			},
			 //选中状态处理
			check(type, index){
				if(type === 'item'){
					this.cartList[index].checked = !this.cartList[index].checked;
				}else{
					const checked = !this.allChecked
					const list = this.cartList;
					list.forEach(item=>{
						item.checked = checked;
					})
					this.allChecked = checked;
				}
				this.calcTotal(type);
			},
			//数量
			numberChange(data){
                console.log(data)
				this.cartList[data.index].num = data.number;
               let good = this.cartList[data.index]
               console.log(good)
             let gooddata = {
                buy_num: good.num,
                 id: good.cms_id,
                 cahtid:good.id,
                // skuid:good.sku.sku_id
              }
                
               postOne('front/shopcart/cartupdate',gooddata).then(res => {
                   if(res.message == '成功'){
                       this.$api.msg('添加成功')
                   }
                })
               this.calcTotal();
				
			},
			//删除
			deleteCartItem(index){
               
				let list = this.cartList;
				let row = list[index];
              
                postOne('/front/shopcart/batch',{id:row.id}).then(res => {
                   console.log(res.data)
                   if(res.data.response ===1 ){
                       	this.cartList.splice(index, 1);
                   }
                  
               })
               this.calcTotal();
			
			},
			//清空
			clearCart(){
				uni.showModal({
					content: '清空购物车？',
					success: (e)=>{
						if(e.confirm){
							this.cartList = [];
						}
					}
				})
			},
			//计算总价
			calcTotal(){
				let list = this.cartList;
				if(list.length === 0){
					this.empty = true;
					return;
				}
				let total = 0;
				let checked = true;
				list.forEach(item=>{
					if(item.checked === true){
						total += item.item.goods_price * item.num;
					}else if(checked === true){
						checked = false;
					}
				})
				this.allChecked = checked;
				this.total = Number(total.toFixed(2));
			},
			//创建订单
			createOrder(){
				
				let goodsData = [];
                let list = this.cartList;
                if(list.length === 0){
                	this.empty = true;
                	return;
                }
                list.forEach(item=>{
                	if(item.checked === true){
                        goodsData.push(item)
                		// total += item.item.goods_price * item.num;
                	}
                })
                if(goodsData.length<=0){
                    this.$api.msg('未选择商品')
                    return
                }
				uni.navigateTo({
					url: `/pages/order/createOrder?data=${JSON.stringify({
						goodsData: goodsData
					})}`
				})
			
			}
		}
	}
</script>

<style lang='scss'>
	.container{
		padding-bottom: 134upx;
		/* 空白页 */
		.empty{
			position:fixed;
			left: 0;
			top:0;
			width: 100%;
			height: 100vh;
			padding-bottom:100upx;
			display:flex;
			justify-content: center;
			flex-direction: column;
			align-items:center;
			background: #fff;
			image{
				width: 240upx;
				height: 160upx;
				margin-bottom:30upx;
			}
			.empty-tips{
				display:flex;
				font-size: $font-sm+2upx;
				color: $font-color-disabled;
				.navigator{
					color: $uni-color-primary;
					margin-left: 16upx;
				}
			}
		}
	}
	/* 购物车列表项 */
	.cart-item{
		display:flex;
		position:relative;
		padding:30upx 40upx;
		.image-wrapper{
			width: 230upx;
			height: 230upx;
			flex-shrink: 0;
			position:relative;
			image{
				border-radius:8upx;
			}
		}
		.checkbox{
			position:absolute;
			left:-16upx;
			top: -16upx;
			z-index: 8;
			font-size: 44upx;
			line-height: 1;
			padding: 4upx;
			color: $font-color-disabled;
			background:#fff;
			border-radius: 50px;
		}
		.item-right{
			display:flex;
			flex-direction: column;
			flex: 1;
			overflow: hidden;
			position:relative;
			padding-left: 30upx;
			.title,.price{
				font-size:$font-base + 2upx;
				color: $font-color-dark;
				height: 40upx;
				line-height: 40upx;
			}
			.attr{
				font-size: $font-sm + 2upx;
				color: $font-color-light;
				height: 50upx;
				line-height: 50upx;
			}
			.price{
				height: 50upx;
				line-height:50upx;
			}
		}
		.del-btn{
			padding:4upx 10upx;
			font-size:34upx; 
			height: 50upx;
			color: $font-color-light;
		}
	}
	/* 底部栏 */
	.action-section{
		/* #ifdef H5 */
		margin-bottom:100upx;
		/* #endif */
		position:fixed;
		left: 30upx;
		bottom:30upx;
		z-index: 95;
		display: flex;
		align-items: center;
		width: 690upx;
		height: 100upx;
		padding: 0 30upx;
		background: rgba(255,255,255,.9);
		box-shadow: 0 0 20upx 0 rgba(0,0,0,.5);
		border-radius: 16upx;
		.checkbox{
			height:52upx;
			position:relative;
			image{
				width: 52upx;
				height: 100%;
				position:relative;
				z-index: 5;
			}
		}
		.clear-btn{
			position:absolute;
			left: 26upx;
			top: 0;
			z-index: 4;
			width: 0;
			height: 52upx;
			line-height: 52upx;
			padding-left: 38upx;
			font-size: $font-base;
			color: #fff;
			background: $font-color-disabled;
			border-radius:0 50px 50px 0;
			opacity: 0;
			transition: .2s;
			&.show{
				opacity: 1;
				width: 120upx;
			}
		}
		.total-box{
			flex: 1;
			display:flex;
			flex-direction: column;
			text-align:right;
			padding-right: 40upx;
			.price{
				font-size: $font-lg;
				color: $font-color-dark;
			}
			.coupon{
				font-size: $font-sm;
				color: $font-color-light;
				text{
					color: $font-color-dark;
				}
			}
		}
		.confirm-btn{
			padding: 0 38upx;
			margin: 0;
			border-radius: 100px;
			height: 76upx;
			line-height: 76upx;
			font-size: $font-base + 2upx;
			background: $uni-color-primary;
			box-shadow: 1px 2px 5px rgba(217, 60, 93, 0.72)
		}
	}
	/* 复选框选中状态 */
	.action-section .checkbox.checked,
	.cart-item .checkbox.checked{
		color: $uni-color-primary;
	}
</style>
